Health officials in Quebec City have identified a cooling tower at a building in Quebec City as the source of the deadly Legionnaires outbreak.

It's the Complexe Jacques-Cartier, a building managed by the CSQ teachers union.

The building's ventilation system has been shut off while crews work to disinfect the unit.

13 people have died of the disease in the provincial capital since July, and another 180 people have been made sick.

There haven't been any new cases reported, however, in the last two weeks.